8621128 has 8 divisors (see below), whose sum is σ = 16164630. Its totient is φ = 4310560.

The previous prime is 8621101. The next prime is 8621143. The reversal of 8621128 is 8211268.

It can be written as a sum of positive squares in only one way, i.e., 6666724 + 1954404 = 2582^2 + 1398^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 8621096 and 8621105.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 538813 + ... + 538828.

Almost surely, 2^8621128 is an apocalyptic number.

It is an amenable number.

8621128 is a deficient number, since it is larger than the sum of its proper divisors (7543502).

8621128 is a wasteful number, since it uses less digits than its factorization.

8621128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077647 (or 1077643 counting only the distinct ones).

The product of its digits is 1536, while the sum is 28.

The square root of 8621128 is about 2936.1757440589. The cubic root of 8621128 is about 205.0476034602.

The spelling of 8621128 in words is "eight million, six hundred twenty-one thousand, one hundred twenty-eight".